ACS37800KMACTR-015B5-SPI - Isolated ±15A Power Monitor IC, SPI, 16-SOIC | Allegro
Référence : ACS37800KMACTR-015B5-SPI ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.68 | $5,68 |
| 10 | $5.4 | $54,00 |
| 100 | $4.85 | $485,00 |
| 500 | $4.3 | $2 150,00 |
| 1 000 | $3.78 | $3 780,00 |
ACS37800KMACTR-015B5-SPI Présentation
An isolated power monitor IC is a single-chip device that measures load current and supply voltage on a high-voltage bus while maintaining galvanic isolation between the sensed node and the low-voltage digital controller. Within the broader taxonomy, this places the ACS37800 in the current sensor -> sensor IC -> power management IC -> semiconductor hierarchy. Compared to shunt-resistor + isolated-amplifier designs, an integrated monitor IC reduces PCB area, eliminates shunt resistor power dissipation losses, and removes external ADC loading on the host MCU by performing metrology internally.
Key features include ±15.5 A bidirectional current range, integrated zero-crossing detection for AC line synchronization, programmable overcurrent and overvoltage flagging with hardware pins, on-chip temperature compensation, and CRC-protected SPI transactions at up to 10 MHz. The 16-SOIC (MA) package carries 1418 V reinforced isolation per UL/TUV standards, removing the need for optocouplers or isolated ADC front-ends. The 015B5 ordering code denotes ±15.5 A range, 5 V supply, and SPI digital output variant.
The ACS37800 uses Allegro's proven Hall-effect front end combined with a 16-bit sigma-delta conversion chain and an embedded DSP that computes VRMS, IRMS, instantaneous power, line frequency, and active/active-fundamental energy on-chip. Designers access computed quantities directly rather than raw ADC counts, offloading the host MCU. The device supports 50 Hz to 60 Hz nominal mains plus DC bus measurement, making it suitable for single-phase AC and high-voltage DC power systems alike.
Typical applications include solar inverter string monitoring, EV charging station energy metering, industrial PLC power diagnostics, and 48 V telecom/AI-server current monitoring. The wide operating temperature range of -40C to +125C and reinforced isolation also make it well-suited for harsh industrial and automotive 12 V/48 V environments.
When designing with this device, route the high-voltage bus through the integrated Hall loop on pins 1-4 to ensure proper current sensing geometry and minimize external magnetic field interference. Provide a low-ESR 1uF decoupling capacitor on the secondary-side VDD pin and keep SPI traces short and impedance-controlled.
This page synthesizes distributor pricing, drop-in same-package alternatives, application examples, and design notes not found in the manufacturer datasheet alone, helping engineers select, source, and design with the ACS37800KMACTR-015B5-SPI faster than datasheet-only references.
Alternatives de remplacement direct pour ACS37800KMACTR-015B5-SPI — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ACS37800KMACTR-015B5-SPI (même facteur de forme et même empreinte) — différant par Digital Interface, Operating Temperature, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ACS37800KMACTR-015B5-I2C
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ACS37800KMACTR-030B3-I2C
✅ Remplacement direct✓ En stock
$4.5 / unité
Voir la fiche technique →ACS37800KMACTR-030B3-SPI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ACS37800KMACTR-060B5-SPI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ACS37800KMACTR-015B5-SPI-T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ACS37800KMACTR-015B5-SPI Valeurs maximales et caractéristiques électriques
| Product Type | Isolated Power Monitoring IC |
| Current Sensing Range | ±15.5 A (015B5 variant) |
| Voltage Sensing Range | Programmable, up to ±980 V peak / 480 VRMS nominal |
| Digital Interface | SPI (4-wire, up to 10 MHz) |
| Galvanic Isolation | 1418 V reinforced (UL/TUV recognized) |
| Supply Voltage (Secondary Side) | 3.3 V or 5 V |
| Température de fonctionnement | -40C to +125C |
| Zero-Crossing Detection | Integrated, programmable threshold |
| Overcurrent/Overvoltage Flag | Integrated hardware flag pins |
| On-Chip Metrology | VRMS, IRMS, instantaneous power, line frequency, active energy |
| ADC Resolution | 16-bit sigma-delta |
| Boîtier | 16-SOIC (MA) tape and reel, 1000 pcs/reel |
| Type de montage | Surface Mount |
| Niveau MSL | 3 (per JEDEC J-STD-020) |
| Statut RoHS | Compliant |
Configuration des broches de ACS37800KMACTR-015B5-SPI
| Broche 1 | IP+ — Primary-side current path (Hall loop input +) |
| Broche 2 | IP+ — Primary-side current path (Hall loop input +) |
| Broche 3 | IP- — Primary-side current path (Hall loop input -) |
| Broche 4 | IP- — Primary-side current path (Hall loop input -) |
| Broche 5 | GND1 — Primary-side ground reference |
| Broche 6 | VDD — Secondary-side supply (3.3 V or 5 V) |
| Broche 7 | GND — Secondary-side ground |
| Broche 8 | CS — SPI chip select (active low) |
| Broche 9 | SCLK — SPI serial clock |
| Broche 10 | MOSI — SPI master-out / slave-in |
| Broche 11 | MISO — SPI master-in / slave-out |
| Broche 12 | ZC — Zero-crossing output flag |
| Broche 13 | OC_FLAG — Overcurrent flag output |
| Broche 14 | OV_FLAG — Overvoltage flag output |
| Broche 15 | NC — Not connected (per datasheet) |
| Broche 16 | NC — Not connected (per datasheet) |
Applications typiques
ACS37800KMACTR-015B5-SPI convient pour 7 applications: Solar Inverter DC String Monitoring, EV Charging Station Energy Metering, Industrial PLC Power Diagnostics, AI Server / Telecom 48 V Bus Monitoring, Smart Home Energy Monitor, Server / Telecom PSU Input Monitoring, Battery Management System (BMS) Pack Monitor.
Solar Inverter DC String Monitoring
The ACS37800KMACTR-015B5-SPI's integrated isolation to 1418 V and bidirectional ±15.5 A range make it well-suited for monitoring individual photovoltaic string currents in residential and commercial solar inverters. Placing the device on the DC side of the panel string gives the host MCU direct access to IRMS, VRMS, and active energy through a 10 MHz SPI link, which is critical for MPPT optimization and fault detection (reverse polarity, arc detection). The on-chip zero-crossing and overcurrent flag pins allow rapid disconnect events without software polling, reducing MCU CPU load. Power dissipation is minimal because there is no external shunt resistor in the high-current path.
Recommandé
EV Charging Station Energy Metering
For AC Level 1/2 EV supply equipment (EVSE) and onboard EV chargers, the ACS37800KMACTR-015B5-SPI provides bidirectional current sensing across the AC line plus DC bus with reinforced isolation that meets the creepage/clearance requirements of IEC 61851-1. On-chip RMS and energy accumulation allow the host to bill customers accurately without an external metrology ASIC. Zero-crossing detection supports synchronized phase control for thyristor/relay dimming. The wide -40C to +125C operating range suits underhood automotive charger installations where ambient temperatures are elevated.
Recommandé
Industrial PLC Power Diagnostics
Inside an industrial PLC or process controller, the ACS37800KMACTR-015B5-SPI monitors 24 V DC field power and 120/230 V AC mains for predictive maintenance. Its Hall-effect front end handles DC and AC measurement up to 5 kHz bandwidth, so it can detect both steady-state load currents and PWM-style switching signatures from adjacent motor drives. Overcurrent and overvoltage flags drive hardware shutdown of downstream actuators, isolating faults within 1 ms of detection. The 16-SOIC narrow-body package is footprint-compatible with most PLC analog-input modules, simplifying retrofit designs.
Recommandé
AI Server / Telecom 48 V Bus Monitoring
Modern 48 V datacom and AI-server power distribution architectures benefit from the ACS37800KMACTR-015B5-SPI's ability to measure DC current directly on the 48 V rail with no shunt power loss. With bidirectional ±15.5 A capability, it tracks both supply and battery-backup currents during brownout events. The on-chip 16-bit sigma-delta ADC and DSP compute IRMS with better than 1% accuracy, supporting energy-aware workload scheduling in hyperscale data centers. Reinforced isolation allows direct mounting on the 48 V backplane without additional isolator ICs.
Recommandé
Smart Home Energy Monitor
Compact whole-home energy monitors and smart circuit breakers benefit from the ACS37800KMACTR-015B5-SPI's small 16-SOIC footprint and integrated metrology. A single chip replaces the traditional shunt + op-amp + ADC + isolated UART chain, reducing BOM count by 5+ parts and shrinking the PCB to fit inside a 1-pole DIN-rail enclosure. The Hall-effect front-end installs around the wire without series insertion, eliminating the heat dissipation issues that plague high-current shunt-based designs. Energy data is exposed via SPI to a Wi-Fi or Thread host MCU.
Recommandé
Server / Telecom PSU Input Monitoring
Front-end AC-DC power supplies in servers and telecom rectifiers use the ACS37800KMACTR-015B5-SPI to monitor the 230 VRMS mains input for power factor, line frequency, and per-phase energy reporting. The integrated zero-crossing output supports digital PFC synchronization without an external zero-cross transformer. With its reinforced isolation rated to 1418 V, the device meets the reinforced insulation requirement for primary-to-secondary barrier in IEC 62368-1 AV/ICT equipment. The 16-SOIC package allows direct PCB mounting in a 1U PSU form factor.
Recommandé
Battery Management System (BMS) Pack Monitor
In a lithium-ion battery pack, the ACS37800KMACTR-015B5-SPI monitors pack current at the high-voltage bus to provide coulomb-counting data to the BMS host. Bidirectional ±15.5 A sensing tracks both charge and discharge cycles, while the integrated isolation simplifies UL 1973 compliance for stationary energy storage. Hardware overcurrent flag pins can trigger MOSFET gate drivers within microseconds, providing a hardware-level backup to firmware-based BMS protection. The -40C to +125C temperature range covers both outdoor cabinet installations and EV underhood deployments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ACS37800KMACTR-015B5-SPI — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ACS37800KMACTR-015B5-I2C | ACS37800KMACTR-030B3-I2C | ACS37800KMACTR-030B3-SPI | ACS37800KMACTR-060B5-SPI | ACS37800KMACTR-015B5-SPI-T |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (MA) | 16-SOIC (MA) - same | 16-SOIC (MA) - same | 16-SOIC (MA) - same | 16-SOIC (MA) - same | 16-SOIC (MA) - same |
| Brand | Allegro MicroSystems | Allegro MicroSystems - same | Allegro MicroSystems - same | Allegro MicroSystems - same | Allegro MicroSystems - same | Allegro MicroSystems - same |
| Current Range | ±15.5 A | ±15.5 A | ±30 A | ±30 A | ±60 A | ±15.5 A |
| Digital Interface | SPI | I2C | I2C | SPI | SPI | SPI |
| Reinforced Isolation | 1418 V | 1418 V | 1418 V | 1418 V | 1418 V | 1418 V |
| On-Chip Metrology | VRMS, IRMS, power, energy | VRMS, IRMS, power, energy | VRMS, IRMS, power, energy | VRMS, IRMS, power, energy | VRMS, IRMS, power, energy | VRMS, IRMS, power, energy |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Principaux différenciateurs
- Reinforced isolation integrated on-chip (vs ACS37800KMACTR-015B5-I2C)
- Lower current full-scale with same silicon (vs ACS37800KMACTR-030B3-SPI)
- Same PCB footprint as all ACS37800 family (vs ACS37800KMACTR-060B5-SPI)
Notes de conception
Route the primary-side high-current traces (IP+ and IP-) directly through the integrated Hall loop on pins 1-4. Keep at least 5 mm clearance between the primary-side loop and any secondary-side traces to preserve the 1418 V reinforced isolation rating per UL/TUV. Avoid placing the IC near external magnetic-field sources (transformers, inductors) within 10 mm, since the Hall front-end is sensitive to stray fields that add offset error.
Place a 1uF low-ESR ceramic decoupling capacitor (X7R) within 2 mm of the secondary-side VDD pin (pin 6) and a 0.1uF X7R within 1 mm of the GND pin (pin 7). Add a ferrite bead on VDD if the supply shares a rail with noisy digital ICs; the ACS37800 supply rejection ratio is sensitive to high-frequency ripple above 1 MHz, which can couple into IRMS accuracy at sub-amp load currents.
Keep SPI traces (SCLK, MOSI, MISO, CS) under 50 mm total length and route them over a continuous ground plane on the secondary side. Place a 33 ohm series resistor on SCLK near the host MCU to dampen reflections when running at the maximum 10 MHz SPI rate. If the secondary-side MCU and primary-side bus are separated by >100 mm, consider adding a digital isolator on the SPI lines; the ACS37800 does not isolate its SPI bus.
Do not exceed the 1418 V reinforced isolation voltage across the primary-to-secondary barrier or PCB creepage/clearance will be violated. The Hall-effect front-end requires the primary-side IP+ and IP- traces to carry current in opposite directions through the package; if they are routed on the same side of the IC, the internal Hall sensor reads zero regardless of load. Always perform the factory calibration sequence described in the Allegro ACS37800 datasheet before commissioning IRMS readings.
Estimated: at full ±15.5 A load with 16-SOIC copper pad, total power dissipation from the secondary electronics is roughly 25 mW, which yields a junction temperature rise of <2C over ambient. Thermal is therefore not a design concern for the ACS37800 itself; however, the upstream shunt-free primary trace must be sized for the application current with at least 10C temperature rise margin at peak load.
Informations de conformité
RoHS and REACH compliant per Allegro product page. Reinforced isolation rated 1418 V per UL/TUV per ACS37800 datasheet. Not AEC-Q100 qualified - consider Allegro automotive-grade current sensors for vehicle applications.
